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Continue to ChatKSP-QB-19.1-4 - Brass, Retracted Bolt Length 19.1mm, Q Type, Castell KSP Spring Bolt Interlock https://www.concretespares.ie/product/ksp-qb-19-1-4-brass-retracted-bolt-length-19-1mm-q-type-castell-ksp-spring-bolt-interlock/