For pressurized blasting systems (reference data):

Inner hole 1 inch (25.4mm), outer diameter (39mm)

Inner hole 3/4 inch (19mm), outer diameter (33mm)

Inner hole 1/2 inch (12.7mm), outer diameter (26.5mm)

For typical blasting systems (reference data):

Inner hole 3/4 inch (19mm), outer diameter (27mm)

Inner hole 3/4 inch (19mm), outer diameter (27mm）

Inner hole 5/8 inch (15.8mm), outer diameter（23mm）

Inner hole 1/2 inch (12.7mm), outer diameter（20.8mm）

Inner hole 3/8 inch (9.5mm), outer diameter (15.7mm)