Firth Grey Block 190 x 190 x 140mm SKU: 431428 MODEL: 1511REB Sorry, there is currently no online price available for this product.Contact your local store for pricing and availability. Mitre 10 SAvailable at selected stores. Check your local store for details Variants Rebate Lintel masonry block 15.11. Features and benefits Hard wearing, durable and dimensionally accurate. Half size block creating the rebate for doors and windows.