Description Line Diameter Sheave Diameter Weight Bearing Type Single Acetal Loop (PULR1530) Series 17 single block with loop top with 17mm Acetal sheave and stainless steel sided plates for general purpose use.Ideal for small marine and industrial rope applications 6 mm 17 mm 5 g Plain Single Brass Loop (PULR1537) Series 17 single block with loop top with 17mm Brass sheave and stainless steel sided plates for general purpose use.Ideal for small marine and industrial rope applications 4 mm Rope, 3 mm Wire 18 mm 10 g Plain Single Acetal Clevis Pin (PULR1550) Series 17 single block with clevis pin top and 17mm Acetal sheave and stainless steel sided plates for general purpose use.Ideal for small marine and industrial rope applications 6 mm 17 mm 8 g Plain Single Acetal Spacer (PULR1560) Series 17 single block with hollow spacer head to take M3 fastening and 17mm Acetal sheave and stainless steel sided plates for general purpose use.Ideal for small marine and industrial rope applications (Fixing = M3) 6 mm 17 mm 7 g Plain Single Acetal Swivel Eye (PULR1563) Series 17 single block with swivel top and 17mm Acetal sheave and stainless steel sided plates for general purpose use.Ideal for small marine and industrial rope applications 6 mm 17 mm 10 g Plain Double Acetal Loop (PULR1570) Series 17 double block with loop top and 17mm Acetal sheave and stainless steel sided plates for general purpose use.Ideal for small marine and industrial rope applications (Breaking Load = 225 kg) 6 mm 17 mm 15 g Plain Single Acetal Micro Cheek and Upright (PULR1580) Series 17 single cheek block use M3 fastening, 17mm Acetal sheave and stainless steel sided plates for general purpose use.Ideal for small marine and industrial rope applications (Fixing = M3, Breaking Load = 225 kg) 6 mm 17 mm 10 g Plain Single Acetal Upright Lead (PULR1590) Series 17 single upright lead block use 3m fastening,17mm Acetal sheave and stainless steel sided plates for general purpose use.Ideal for small marine and industrial rope applications (Fixing = M3) 6 mm 17 mm 11 g Plain Single Acetal Thru Deck (PULR1600) Series 17 single upright block and 17mm Acetal sheave and stainless steel sided plates for general purpose use.Ideal for small marine and industrial rope applications (Fixing = M3) 6 mm 17 mm 9 g Plain