Abrasive sand belts to polish ms steel pipes

want to buy
Sand belts

We want to buy abrasive sand belts to polish ms steel pipes od 20 mm
Dry polish we are using now the following item

Item: DYM85
Backing: 100% Polyester Cloth
Grain: Calcined Grain
Bond: R/R
Size of Belt: 5" x 73"
Grid size 400

But we need long lasting belts
We need 500 pcs
Ps quote cif Riyadh dry duck via dammam by sea