Single ball bearing block - Sheave 25 - Swivel head
Single ball bearing block - Sheave 25 - Fixed eye
Single ball bearing block - Sheave 25 - Fixed eye & becket
Single ball bearing block - Sheave 25 - Cheek block
Single ball bearing block - Sheave 25 - Upright lead block
Single ball bearing block - Sheave 25 - Opposite in line