Most guardrails use solid wood frames (pine is commonly mentioned) and are finished with paint or stain for durability and appearance.
Universal guardrail kits generally include two toddler guardrails plus two stretcher rails needed for attachment. Some guardrails are sold individually (one guardrail per box). Crib and mattress are sold separately.
The main styles are slat-style (flat slat/spindle) and dowel-style (spindle) guardrails—choose the style that matches your crib’s look and attachment method.
Compatibility is usually limited to select convertible-crib models; listings often specify which models they fit or advise checking your crib’s assembly instructions. Product details and reviews commonly note whether parts align with pre-drilled holes and whether the guardrail can attach without modification—check those details and your crib’s manual before purchasing.
Kit versions typically include two stretcher-rail options to attach the guardrails to cribs that need a stretcher rail. Always verify compatibility with your crib’s assembly instructions before purchasing.