Stand up blocks have a stainless steel eye fitted to a stainless steel loop, through-bolted for strength. The moulded plastic spring/gaiter prevents the block tumbling or ropes snagging. Length Width Height Sheave Ø Max Rope Ø Break Load SWL Weight 80 mm 42 mm 120 mm 45 mm 10 mm 980 kg 490 kg 223 g