DORMA BTS75 V Floor Spring - Hold Open/ Non Hold Open. Interior and exterior doors up to 1100mm or 120kg max. Backcheck - Ideal for high traffic doors as it offers resistance when the door is opened with excessive force; preventing damage to doors. Dual handed for push or pull side mounting. Closing and latch speed adjustments for a perfect closing action.A brand-new, unused, unopened and undamaged item in the original packaging (where packaging is applicable).